[Koleksi Kode Sumber] (8) : Menghitung luas dan keliling sebuah lingkaran

[sourcecode language=”cpp”]
/* P-2.2 */
/* Calculate the area and circumference of a circle
of specified radius */
[/sourcecode]

[sourcecode language=”cpp”]
#include <stdio.h>
#define PI 3.14159
int main(void)
{
double radius, /* input – radius of a circle, cm */
area, /* output – area of a circle, cm^2 */
circumference; /* output – circumference of a circle, cm */
/* Get the radius. */
printf(“Enter the radius in cm: “);
scanf(“%lf”,&radius);
/* Calculate the area and circumference. */
area = PI*radius*radius;
circumference = 2*PI*radius;
/* Display the output. */
printf(“The area is %f cm^2.\n”,area);
printf(“The circumference is %f cm.\n”,circumference);
return (0);
}
[/sourcecode]
Sumber : David R. Brooks C Programming: The Essentials for Engineers and Scientists. Springer, NY, 1999

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